performance

Hi Derecho / Cheyenne / CESM users, I am planning to run some simulations but realised while setting up and running some test simulations that there is a performance issue that seems to occur using Derecho. A strong decrease in the performance is visible an I/we do not understand why this...

Hello, I'm in the process of porting CESM2 to the new Dutch supercomputer Snellius, which is comprised of AMD EPYC 7H12 processors. Each node has 2 CPU's with 64 cores each, making 128 cores per node in total. Nodes are tied together with Infiniband HDR100 (100Gbps), fat tree topology. So far...

I want to running CESM in my ARMV8 machine, but find out that the performance is not good enough, The major time consumption stays at mapz_module and clubb_intr inside Cam, can anyone provide an optimized version?

We have a cluster with relatively slow interconnect between nodes, its geared to high thru-put not HPC. We would welcome guidance: are we overoptimistic if we seek to run say 2 degree by 2 degree CESM on just one node with spec: 768Gb 40core Intel(R) Xeon(R) Gold 6138 CPU @ 2.00GHz nodes with...